feat: redesign dashboard with Fluent KPI tiles, connection strip, and devices column

- Replace LCD-style readings with a 3×2 KPI tile grid (Fluent card surfaces, 52pt values)
- Add persistent top connection strip with horizontal chips + pump name badge
- Add elapsed test timer (DispatcherTimer, mm:ss) to Test Summary card
- Restyle Test Summary and Active Alarms with Fluent brushes/iconography
- Add Devices column (CAN / K-Line / Bench tiles) between KPI grid and test/alarms
  - Enumerates attached PCAN USB channels via PCAN_ATTACHED_CHANNELS API
  - Enumerates FTDI K-Line adapters via existing FtdiInterface helpers
  - Click to connect/disconnect; confirmation dialog when session active or test running
  - Hover tint: blue = will connect, red = will disconnect; Bench row is read-only stub
- Extend ICanService with SelectedChannel + EnumerateAttachedChannels()
- Expose IKwpService.ConnectedPort for active session device tracking
- Add DeviceRow button style with MultiDataTrigger hover colour logic
- Add 30+ new localization keys (ES + EN) for KPI labels, devices, confirmations

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Views/UserControls/BenchDriveControlView.xaml

@@ -17,7 +17,7 @@
         <ToggleButton IsChecked="{Binding BenchControl.IsDirectionRight}"
                       Height="32" FontSize="12" FontWeight="SemiBold">
             <ToggleButton.Style>
-                <Style TargetType="ToggleButton">
+                <Style TargetType="ToggleButton" BasedOn="{StaticResource {x:Type ToggleButton}}">
                     <Setter Property="Content" Value="{DynamicResource Bench.Left}"/>
                     <Style.Triggers>
                         <Trigger Property="IsChecked" Value="True">
@@ -72,13 +72,13 @@
         <ToggleButton IsChecked="{Binding BenchControl.IsOilPumpOn}"
                       Height="32" FontSize="12" FontWeight="SemiBold">
             <ToggleButton.Style>
-                <Style TargetType="ToggleButton">
+                <Style TargetType="ToggleButton" BasedOn="{StaticResource FluentStateToggle}">
                     <Setter Property="Content" Value="{DynamicResource Bench.OilOff}"/>
-                    <Setter Property="Background" Value="LightGray"/>
                     <Style.Triggers>
                         <Trigger Property="IsChecked" Value="True">
                             <Setter Property="Content" Value="{DynamicResource Bench.OilOn}"/>
-                            <Setter Property="Background" Value="#80FF80"/>
+                            <Setter Property="Background" Value="#26C200"/>
+                            <Setter Property="Foreground" Value="White"/>
                         </Trigger>
                     </Style.Triggers>
                 </Style>